ST7DALIF2 STMicroelectronics, ST7DALIF2 Datasheet - Page 23

• Manufacturer Part Number: ST7DALIF2
• Description: 8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, DATA EEPROM, ADC, TIMERS, SPI
• Manufacturer: STMicroelectronics

Specifications of ST7DALIF2

• 8 Kbytes Single Voltage Flash Program Memory With Read-out Protection, In-circuit Programming And In-application Programming (icp And Iap). 10k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55°C.
• 256 Bytes Data Eeprom With Read-out Protection. 300k Write/erase Cycles Guaranteed, Data Retention: 20 years at 55°C.
• Clock Sources: Internal 1% RC oscillator, crystal/ceramic resonator or external clock
• Five Power Saving Modes: Halt, Active-Halt, Wait and Slow, Auto Wake Up From Halt

ST7DALIF2
7
7.1
7.2
7.3
Data EEPROM
Introduction
The Electrically Erasable Programmable Read Only Memory can be used as a non volatile
back-up for storing data. Using the EEPROM requires a basic access protocol described in
this chapter.
Main features
■
■
■
■
■
■
Figure 5.
Memory access
The Data EEPROM memory read/write access modes are controlled by the E2LAT bit of the
EEPROM Control/Status register (EECSR). The flowchart in
different memory access modes.
Read operation (E2LAT=0)
The EEPROM can be read as a normal ROM location when the E2LAT bit of the EECSR
register is cleared.
EECSR
Up to 32 Bytes programmed in the same cycle
EEPROM mono-voltage (charge pump)
Chained erase and programming cycles
Internal control of the global programming cycle duration
Wait mode management
Readout protection
EEPROM block diagram
0
ADDRESS BUS
0
DECODER
ADDRESS
0
0
4
0
DECODER
0
4
4
ROW
E2LAT
E2PGM
128
MULTIPLEXER
DATA
(1 ROW = 32 x 8 BITS)
MEMORY MATRIX
HIGH VOLTAGE
Figure 6
DATA BUS
EEPROM
PUMP
DATA LATCHES
128
32 x 8 BITS
describes these
Data EEPROM
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